A behind-the-scenes look at the inner workings of the supermarket during the festive period, revealing the secrets of the retailer's success, and how it rose from a grocery chain that once baffled its UK customers, to a brand that took almost one billion pounds in December 2018, enjoying its busiest week to date. The programme also follows the retailer from its arrival in Britain in the 1990s, through changing times and changing tastes to become the brand it is today, and reveals how the discounter came to fill television screens at Christmas, taking on the big name brand adverts with their own festive versions.